NAND08GAH0A NUMONYX [Numonyx B.V], NAND08GAH0A Datasheet - Page 38

• Manufacturer Part Number: NAND08GAH0A
• Manufacturer: NUMONYX [Numonyx B.V]

High speed MultiMediaCard operation
Table 15.
38/116
PWD_LEN + 1
Byte
...
0
1
2
includes all the required information of the command (password setting mode, password,
Lock/Unlock etc.) (see
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The Lock/Unlock command sequences are described in the following paragraphs.
Lock/Unlock data block
ERASE bit: this bit must be set to ‘1’ (all other bits shall be ‘0’) to perform a Forced
Erase operation, and only the Cmd byte is sent.
LOCK/UNLOCK bit: The device is locked and unlocked by setting the Lock/Unlock bit
to ‘1’ or ‘0’, respectively. Setting this bit together with the SET_PWD bit is allowed, while
setting it together with CLR_PWD bit is forbidden.
CLR_PWD bit: this bit must be set to ‘1’ to clear the password.
SET_PWD bit: this bit must be set to ‘1’ to set a new password.
PWD_LEN: this byte contains the password length expressed in bytes. Valid password
length ranges from 1 to 16 bytes. PWD_LEN indicates if a password is currently set. If
its value is equal to zero, no password is set, if it is different from zero, the device is
locked after power-up.
Password (PWD): these bytes contain the new or current password (depending on the
command). The data block size is defined by the host before sending the device
Lock/Unlock command. Different password sizes are allowed.
Bit 7
Bit 6
Reserved
Bit 5
Table
Bit 4
15):
ERASE
Bit 3
Password data (PWD)
PWD_LEN
LOCK_UNLOCK
Bit 2
NAND08GAH0A, NAND16GAH0D
CLR_PWD
Bit 1
SET_PWD
Bit 0